Water Breathing

Artificer    Druid    Ranger    Sorcerer    Wizard

Level 3 Transmutation (ritual)

Casting Time: 1 action
Range: 30 feet
Components: V, S, M (a short reed or piece of straw)
Duration: 24 hours

This spell grants up to ten willing creatures you can see within range the ability to breathe underwater until the spell ends. Affected creatures also retain their normal mode of respiration.

Source: Player's Handbook, p. 287